Question

What kind of roadways freeze first when wet?

1) Highways
2) City streets
3) Rural roads
4) Bridges

Answer 1

4) Bridges. Bridges freeze first when wet due to their exposure to cold air from all sides.

Step-by-step explanation:

The kind of roadways that freeze first when wet can be explained by the concept of thermal conductivity. When wet, the roadway surface loses heat faster, leading to freezing.

In this case, bridges freeze first compared to other roadways such as highways, city streets, and rural roads. Bridges are exposed to cold air from all sides, which makes them lose heat more quickly than other roadways.

This is why it is important to use salt on roads when snow or ice is forecasted, as the salt lowers the freezing point of water and prevents icy conditions on the roadway surface.